Lock.



Patented Apr, 29. 190 2.

A. 'FREDEBIKISEN.

LOCK. I

(Application flied Oct. 16, 1900.)

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UNITED STATES PATENT OFFICE.

' ANTON FREDERIKSEN, OF COPENHAGEN, DENMARK.

LOCK.

SPECIFICATION forming part of Letters Patent N 0. 698,486, dated April 29, 1902. Application filed October 15, 1900. Seria1N0; 33,128. (No niodeld T on whom itwmy concern..-

Be it known that I, ,ANTON'FREDERIKSEN, a citizen of Denmark,residing at Copenhagen, Denmark, have invented certain new and useful Improvements in Safety-Locks, of which the following is a full specification.

Referring to the drawings, Figure 1 shows a vertical sectional view, in full size, of the lock with its key, taken on the line 1 1, Fig. 4; Fig. 2, a sectional view of the labyrinthic path for a ball, taken on line 2 2, Fig. 1; Fig. 3, a front sectional view of the key-bit engaging the said path; Fig. 4, a front view showing the arrangement of the latches, &c., the labyrinth and its casingbein g removed. Fig. 5 is a section through the knob or key bow on line 5 5 of Fig. 1, somewhat enlarged for the sakeof clearness.

Figs. 1 and 2 show the revoluble key-box provided with specially-arranged guideways for the ball 2** and mounted in the stationary are marked with corresponding numbers at,"

respectively, the outside of the box and on the glass plate of the key-bow.

When the lock is being closed, the ball 2 will. roll in the guideways until it will rest in one of the projections 5 at the lower side of the key-bore, In order to open the door, it will be necessaryto set the ball 2 in the bow of the key, so thatit will rest in the projection of the bow having the same number as the projection of the key-box in which the ball 2 rests. Then the key is inserted and turned alternately right and left, as it may be, until the ball 2 of the bow of the key will have arrived at the center of the bow, when the ball 2 will also have reached the center of the key-box, as shown in Fig. 2. In the hollow key-shank 6 is placed a pin 7, connected with an arm 9, passing through and slidingly movable in the slots 8 of the shank and held in position by a spiral spring 11, bearing against the partition 10. y I

The socket 12, inclosing the outside projecting stop 13, isfastened to the key-box 1, concentric with the center of the same. The end of the hollow key-shank is provided with a slot 15, fit to engage the stop 18, so that by projecting in the socket 17 will retain the ball 2- in the key-box until pushed by the pin 17 and will bring it back in position after the lock has been unlocked.

- By pushing the ball 2 into the socket 17 the angular-shaped catch 19 engages with its hook 20 in a Vshaped groove of the lock-bolt 21, thus holding this belt in position and per mitting the spring-pressed bolt 22, which is sliclingly mounted in the door-casing, to enter a slot in the flanged part of the escutcheon, which is flush with the edge of the door-frame,- and to bear against the bolt 21 inside of the keeper formed between the partition 23 and the escutcheon-plate 16 and serving as a guide for the two bolts.

When the bolt 21 is released from the hook 20, the bolt 21, actuated by strong springs 24 pressing against the two shoulders of said bolt 21, pushes the bolt 22 back into the doorcasing, thereby permitting the door to be opened. The door can be locked again by pushing the pin 26, fastened to the bolt 21 and projecting outside the escutcheon, through a slot 25, which limits the motion of said pin, as shown by Figs. 1 and 4:. The hook 20 of the angular catch 19 will then come in engagement with the V-shaped groove of the bolt 21 and permit the bolt 22, as described above, to enter the slot providedat the bent part of the escutcheon.

The lock may be opened without using the key from the inside by shifting the button 29, projecting from the lever 27, which is pivotally fastened to theescutcheon. The pin of said button 29, connecting the button with the lever, passes through the curved slot 28, provided in the escutcheon. By shifting the button 29 the hook 30, forming the other end of the lever 27, will lift the hook 20 of the catch 19, thereby releasing the bolt 21. V

The pin 31 or suitably-arranged balls, rolls, &c., serve to guide the key-box 1.

The small opening 14 of comparatively considerable length is the only passage leading to the inside parts of the lock, and it will therefore be impossible to pick the lock, which is made even more difficult by the hook 20, Fig. 1, being tapered at an acute angle.

The spiral ways of the key-box corresponding with the ways of the bow of the key may be made of any suitable shape, and therefore will permit of a great number of combinations for diiferent looks. The socket 12 may be provided with zigzag-formed slots corresponding with the ways of the key-box and the hollow shank of the key provided with a projecting pin entering said slots.

Having thus particularly described the nature of my invention and in what manner the same is to be performed, wh'atI desire to claim and wish to secure by Letters Patent, is-

1. In a safety-lock a revoluble key-box 1 provided with spiral or labyrin'thic guide'ways' for a ball 2, a key which is provided with a knob-like bow having guide'ways and a ball I 2 corresponding to those of the key-box, and

by engagement with a stop at the key-box turns said box so as to make the ball 2 roll to the center thereof, and means for pushing the ball inside from said position, a bolt released by said ball when pushed inside.

2. In a safety-lock comprising the revolublekey-box with labyrinthic'guideways,a ball 2 rolling therein, a keyhaving hollow shank andknob-like bow with like guideways, and a ball 2 rolling-therein, and means whereby both balls may be brought to a central position by turning said key,- the combination with said parts of a spring-pressed pin 7 playing in the hollow shank of said key and arranged to enter a small hole in the center of the key-box, whereby when said pin is pressed forward, the ball 2 in said key-box is pushed back, a spring-ball released by such action,

and a door-bolt forced out by said spring-bolt lever 19 provided with a lock 20 engaging said spring-bolt to hold it in a retracted position, and means for pushing the ball 2 in the keybox from a central position against said lever to disengage it and release the springbolt.

4. In combination with the spring-bolt 21 and the engaging latch-lever 19 a' pinzo fastened to said bolt and playing in a slot in the escutcheon', whereby said bolt may he moved back to engagement with the latch-'leve'rr 5. In combination with the spring-non 21 and engaging latch-lever 19 a manually-operateddiseng aging-lever 27 pi voftally mounted upon the escutcheonand acting at one end upon the hooked end of the latch-leverto disengage it from the spring-bolt and release the latter.

6. The combination with the spring-pressed bolt, the latch-lever by which it is held, the door-bolt, the ball 2 and its central pocket, of the socket 17, the forked spring 18 and rod or pin 7 movable in the shank of said key.

In testimony whereof I affix my signature in presence of two witnesses.

ANTON FREDERIKSEN.

WVitnesses:

HANS PEDERsErI, J. G. JACOBSEN. 

